Our brain decided what our life was so far. It sets a filter to protect it and ourselves from harm. If it process on everything it perceived, then the work load would be too much and it will have a breakdown. The filter is set by the brain, however we decide how it should work. Ever had a quick idea or a solution to something you were thinking about earlier? Our brain was processing on it on the background, filtering out everything else. Similarly, there is another filter which focus on what we want out of our life. If our focus on current life is how frustrated we are about, or, how fortunate we are, that was our decision, to set the right filter or not. We can always reprogram the filters and create new ones based on what we focus on and life can be what you chose it to be!